What food is repeatedly stuffed in the mouth during the game 'Chubby Bunny'?

Chubby Bunny is an informal recreational and hazing game that involves the placement of an increasing number of marshmallows or similar items such as cotton balls into one's own mouth and stating a phrase that is intended to be difficult to say clearly with a filled mouth. The game is often played where marshmallows are readily available, such as around a campfire. Variations include similar-sounding phrases such as Fluffy Bunny, Fuzzy Bunny, and Chubby Monkey.

Although the origins of the game are unknown, a 1959 Peanuts comic strip shows Snoopy's mouth being filled with an increasing number of marshmallows while Charlie Brown keeps count.

In the game, each participant usually places a marshmallow into their mouth and says 'chubby bunny'. If they are able to state the whole phrase, usually in a comprehensible manner that the other participants wholly concur to, they pass that round. Each successful player then adds an additional marshmallow to the ones already in his or her mouth and repeats the phrase. A player who fails to complete the phrase is eliminated from the game. The process continues until only one player remains. After the penultimate player loses the game, the winning player might have to place one more marshmallow into his or her mouth and may have to state the phrase once more. The winner of the game is the player who fits the most marshmallows into his or her mouth.